I'm original owner of a 2009 GXP with about 21,000 miles. I'm getting occasional flash on low coolant light (I have a very steep driveway). I checked the surge tank and found it was about a half inch low which is annoying because I recently had it in to the dealer I purchased the car from for the air bag seat sensor recall and asked them to check her over and recommend any other maintenance needed (I specifically asked for oil/lube since it was down to about 20% anyway).... So I started doing some research on maintenance based on age versus strictly miles and found coolant should be changed every 5 years regardless of miles. So then I looked up characteristics of bad coolant and for DexCool, it's when it turns from clear orange to rusty red. Mine's clear reddish (in the surge tank anyway). So now I'm really annoyed with the dealer's service department - again. The service manager hasn't returned my calls. I'll get this fixed but my question is what else do I need to be concerned about. I'm guessing brake fluid needs to be looked at/changed.... How about transmission fluid, differential etc.? I'm in a hot, hilly part of the country, but the car is garaged most of the time. I proactively changed the factory battery only last year! Please comment, thanks!